0000720: webstructure.xml api is incomplete for URLs on same host but differents protocols or ports

Description

When using the webstructure.xml API with the about parameter filled with a host name, only references to and from http URLs on default port with this host name are returned.

Steps To Reproduce

- crawl a page with a link to some http url (http://example.tld [^])
- crawl a page with a link to an URL on the same host but with https such as https://example.tld [^]
- crawl a page with a link to an URL on the same host but with another port such as http://example.tld:8080 [^]
- show the computed webstructure for the target domain : /api/webstructure.xml?about=example.tld
-> only one incoming reference is returned <references direction="in" count="1">. To get https and other protocols and port references, you have to perform supplementary api calls : /api/webstructure.xml?about=https://example.tld [^] and /api/webstructure.xml?about=http://example.tld:8080 [^]